Full TGIF Record # 224977
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=210
    Last checked: 07/17/2013
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i
Report
Author(s):Teuton, T. C.; Sorochan, J. C.; Main, C. L.; Mueller, T. C.
Author Affiliation:Department of Plant Sciences, University of Tennessee, Knoxville, TN
Title:Annual bluegrass control with bispyribac-sodium on bentgrass putting greens
Section:Weed management in turf crops
Other records with the "Weed management in turf crops" Section
Meeting Info.:Memphis, Tennessee: January 26-28, 2004
Source:Proceedings: Southern Weed Science Society: 57th Annual Meeting. Vol. 57, 2004, p. 112.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Acetolactate synthase-inhibiting herbicides; Agrostis stolonifera; Bispyribac-sodium; Golf greens; Herbicide efficacy; Herbicide evaluation; Poa annua control
Abstract/Contents:"Annual bluegrass (Poa annua L.) has long been one of the toughest weeds to control in bentgrass (Agrostis palustris Huds.) and ryegrass (Lolium perenne L.). Bispyribac-sodium is an acetolacatate sythesis (ALS) inhibitor which stops the production of branch chain amino acids. Like all of the ALS inhibitors, bispyribac-sodium has selective weed control. An experiment was conducted at Three Ridges Golf Course in Knoxville, TN in the March of 2003 to evaluate of bispyribac-sodium for control of annual bluegrass in a bentgrass putting green maintained at 3 mm. Treatments included bispyribac-sodium 80 WP at 20 g ai/A monthly for 3 months, 5 g ai/A weekly for 3 months, 10 g ai/A weekly for 2 and 3 months, and 5 and 10 g ai/A every other week for 3 months. Treatments were evaluated weekly for annual bluegrass control and bentgrass injury on a scale of 0-100, 0 being no control or injury and 100 being complete annual bluegrass control or bentgrass death. Treatments were also evaluated for overall turfgrass quality (playability) on a scale of 0-9, 0 being dead turf and 9 being ideal turf. Annual bluegrass control 30 days after initial application (DAA) was unacceptable (< 85%) for all treatments with weekly applications at 10 g ai/A showing the best results at 68% and 71%, respectively. Annual bluegrass control increased with both weekly 10 g ai/A treatments. Treatments of 10 g ai/A weekly for 2 or 3 months were the best treatments with >= 98% control for the duration of the study. By 86 DAA control increased for the 5 g ai/A weekly applications to 94%. By 105 DAA the weekly treatment of 5 and 10 g ai/A were the only treatment to provide acceptable annual bluegrass control (>= 86%). Bentgrass injury 30 DAA for the 5 g ai/A weekly treatment at 15%, both 10 g ai/A weekly treatments at 50% and 46%, and 10 g ai/A every other week at 10%, respectively. Injury > 10% is considered excessive for putting greens. However, at 57 DAA only the 10 g ai/A weekly at eight applications remained above the 10% injury level. Bentgrass injury at the 86 and 105 DAA were minimal. Putting green quality 30 DAA was below the minimum 6.5 for the weekly applications of bispyribac-sodium at 10 g ai/A. By 57 DAA all weekly applications of bispyribac-sodium were at or below the minimum 6.5 and remained below that level for the duration of the trial. Initial research has shown bispyribac-sodium may give golf course superintendents a new weapon in their arsenal against annual bluegrass. However, bentgrass injury at putting green height and overall drop in putting quality are of concern. Future research is planned to evaluate multiple rates, timings, and surfactants to decrease bispyribac-sodium injury on bentgrass putting greens."
Language:English
References:0
Note:"The changing world of weed science"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Teuton, T. C., J. C. Sorochan, C. L. Main, and T. C. Mueller. 2004. Annual bluegrass control with bispyribac-sodium on bentgrass putting greens. South. Weed Sci. Soc. Proc. 57:p. 112.
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Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=210
    Last checked: 07/17/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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